Direct Synthesis of Ligand-Based Radicals by the Addition of Bipyridine to Chromium(II) Compounds
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The reaction of 2,2′-bipyridine (bpy) with monomeric chromium(II) precursors was used to prepare the S = 1 complexes Cr(tBu-acac)2(bpy) (1) and (η5-Cp)(η1-Cp)Cr(bpy) (3), as well as the S = 2 compound Cr[N(SiMe3)2]2(bpy) (4). The crystallographically determined bond lengths indicate that the bpy ligands in 1 and 3 are best regarded as radical anions, while 4 shows no structural evidence for electron transfer from CrII to the neutral bpy ligand.
创建时间：
2016-02-19
